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Chimeric repressor of PtSND2 severely affects wood formation in transgenic Populus.

Identifieur interne : 002761 ( Main/Exploration ); précédent : 002760; suivant : 002762

Chimeric repressor of PtSND2 severely affects wood formation in transgenic Populus.

Auteurs : H H Wang [République populaire de Chine] ; R J Tang ; H. Liu ; H Y Chen ; J Y Liu ; X N Jiang ; H X Zhang

Source :

RBID : pubmed:23939552

Descripteurs français

English descriptors

Abstract

NAC domain transcription factors are important regulators that activate the secondary wall biosynthesis in wood formation. In this work, we investigated the possible functions of an NAC family member SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN2 (PtSND2) using chimeric repressor silencing technology. Reverse transcription-polymerase chain reaction, subcellular localization and transcriptional activation analyses indicated that PtSND2 is a wood-associated transcriptional factor with the predicted transcriptional activation activity, which could be inhibited by the repression domain SUPERMAN REPRESSION DOMAIN X (SRDX) in yeast. Wood formation was severely repressed in transgenic poplar plants overexpressing PtSND2-SRDX. Meanwhile, the secondary cell wall thickness of xylem fibers was restrained, and the contents of cellulose and lignin were obviously decreased in the stems of transgenic plants. Further studies indicated that expressions of a number of wood-associated genes were down-regulated in the stems of transgenic plants. Our results suggest that PtSND2 may play important roles during the secondary growth of stems in poplar.

DOI: 10.1093/treephys/tpt058
PubMed: 23939552


Affiliations:


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Le document en format XML

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<term>Cell Wall (metabolism)</term>
<term>Cellulose (metabolism)</term>
<term>Down-Regulation (MeSH)</term>
<term>Gene Expression (MeSH)</term>
<term>Gene Expression Regulation, Plant (MeSH)</term>
<term>Lignin (metabolism)</term>
<term>Plant Proteins (genetics)</term>
<term>Plant Proteins (metabolism)</term>
<term>Plant Stems (cytology)</term>
<term>Plant Stems (genetics)</term>
<term>Plant Stems (growth & development)</term>
<term>Plant Stems (metabolism)</term>
<term>Plants, Genetically Modified (MeSH)</term>
<term>Populus (cytology)</term>
<term>Populus (genetics)</term>
<term>Populus (growth & development)</term>
<term>Populus (metabolism)</term>
<term>Protein Structure, Tertiary (MeSH)</term>
<term>Recombinant Fusion Proteins (MeSH)</term>
<term>Repressor Proteins (genetics)</term>
<term>Repressor Proteins (metabolism)</term>
<term>Transcription Factors (genetics)</term>
<term>Transcription Factors (metabolism)</term>
<term>Transcriptional Activation (MeSH)</term>
<term>Wood (cytology)</term>
<term>Wood (genetics)</term>
<term>Wood (growth & development)</term>
<term>Wood (metabolism)</term>
<term>Xylem (cytology)</term>
<term>Xylem (genetics)</term>
<term>Xylem (growth & development)</term>
<term>Xylem (metabolism)</term>
</keywords>
<keywords scheme="KwdFr" xml:lang="fr">
<term>Activation de la transcription (MeSH)</term>
<term>Bois (croissance et développement)</term>
<term>Bois (cytologie)</term>
<term>Bois (génétique)</term>
<term>Bois (métabolisme)</term>
<term>Cellulose (métabolisme)</term>
<term>Expression des gènes (MeSH)</term>
<term>Facteurs de transcription (génétique)</term>
<term>Facteurs de transcription (métabolisme)</term>
<term>Lignine (métabolisme)</term>
<term>Paroi cellulaire (métabolisme)</term>
<term>Populus (croissance et développement)</term>
<term>Populus (cytologie)</term>
<term>Populus (génétique)</term>
<term>Populus (métabolisme)</term>
<term>Protéines de fusion recombinantes (MeSH)</term>
<term>Protéines de répression (génétique)</term>
<term>Protéines de répression (métabolisme)</term>
<term>Protéines végétales (génétique)</term>
<term>Protéines végétales (métabolisme)</term>
<term>Régulation de l'expression des gènes végétaux (MeSH)</term>
<term>Régulation négative (MeSH)</term>
<term>Structure tertiaire des protéines (MeSH)</term>
<term>Tiges de plante (croissance et développement)</term>
<term>Tiges de plante (cytologie)</term>
<term>Tiges de plante (génétique)</term>
<term>Tiges de plante (métabolisme)</term>
<term>Végétaux génétiquement modifiés (MeSH)</term>
<term>Xylème (croissance et développement)</term>
<term>Xylème (cytologie)</term>
<term>Xylème (génétique)</term>
<term>Xylème (métabolisme)</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="genetics" xml:lang="en">
<term>Plant Proteins</term>
<term>Repressor Proteins</term>
<term>Transcription Factors</term>
</keywords>
<keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en">
<term>Cellulose</term>
<term>Lignin</term>
<term>Plant Proteins</term>
<term>Repressor Proteins</term>
<term>Transcription Factors</term>
</keywords>
<keywords scheme="MESH" qualifier="croissance et développement" xml:lang="fr">
<term>Bois</term>
<term>Populus</term>
<term>Tiges de plante</term>
<term>Xylème</term>
</keywords>
<keywords scheme="MESH" qualifier="cytologie" xml:lang="fr">
<term>Bois</term>
<term>Populus</term>
<term>Tiges de plante</term>
<term>Xylème</term>
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<keywords scheme="MESH" qualifier="cytology" xml:lang="en">
<term>Plant Stems</term>
<term>Populus</term>
<term>Wood</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" qualifier="genetics" xml:lang="en">
<term>Plant Stems</term>
<term>Populus</term>
<term>Wood</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" qualifier="growth & development" xml:lang="en">
<term>Plant Stems</term>
<term>Populus</term>
<term>Wood</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" qualifier="génétique" xml:lang="fr">
<term>Bois</term>
<term>Facteurs de transcription</term>
<term>Populus</term>
<term>Protéines de répression</term>
<term>Protéines végétales</term>
<term>Tiges de plante</term>
<term>Xylème</term>
</keywords>
<keywords scheme="MESH" qualifier="metabolism" xml:lang="en">
<term>Cell Wall</term>
<term>Plant Stems</term>
<term>Populus</term>
<term>Wood</term>
<term>Xylem</term>
</keywords>
<keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr">
<term>Bois</term>
<term>Cellulose</term>
<term>Facteurs de transcription</term>
<term>Lignine</term>
<term>Paroi cellulaire</term>
<term>Populus</term>
<term>Protéines de répression</term>
<term>Protéines végétales</term>
<term>Tiges de plante</term>
<term>Xylème</term>
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<keywords scheme="MESH" xml:lang="en">
<term>Down-Regulation</term>
<term>Gene Expression</term>
<term>Gene Expression Regulation, Plant</term>
<term>Plants, Genetically Modified</term>
<term>Protein Structure, Tertiary</term>
<term>Recombinant Fusion Proteins</term>
<term>Transcriptional Activation</term>
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<term>Protéines de fusion recombinantes</term>
<term>Régulation de l'expression des gènes végétaux</term>
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<div type="abstract" xml:lang="en">NAC domain transcription factors are important regulators that activate the secondary wall biosynthesis in wood formation. In this work, we investigated the possible functions of an NAC family member SECONDARY WALL-ASSOCIATED NAC DOMAIN PROTEIN2 (PtSND2) using chimeric repressor silencing technology. Reverse transcription-polymerase chain reaction, subcellular localization and transcriptional activation analyses indicated that PtSND2 is a wood-associated transcriptional factor with the predicted transcriptional activation activity, which could be inhibited by the repression domain SUPERMAN REPRESSION DOMAIN X (SRDX) in yeast. Wood formation was severely repressed in transgenic poplar plants overexpressing PtSND2-SRDX. Meanwhile, the secondary cell wall thickness of xylem fibers was restrained, and the contents of cellulose and lignin were obviously decreased in the stems of transgenic plants. Further studies indicated that expressions of a number of wood-associated genes were down-regulated in the stems of transgenic plants. Our results suggest that PtSND2 may play important roles during the secondary growth of stems in poplar.</div>
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{{Explor lien
   |wiki=    Bois
   |area=    PoplarV1
   |flux=    Main
   |étape=   Exploration
   |type=    RBID
   |clé=     pubmed:23939552
   |texte=   Chimeric repressor of PtSND2 severely affects wood formation in transgenic Populus.
}}

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